Traveling shears.



J. T. MGGRATH. TRAVELING SHBARS.

'PPLIGATIGN FILED DBG.22,1910. 9726535 latented July 11, 1911.

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J. T. MGGRATH.

TRAVELING SHEARS. APPLICATION HLBD 13130.22, 1910.

997,686, A- A)Patented July 11, 1911.

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J.' T. Ix/ICGMTHlv TRAVELING SHEARS. APPLICATION FILED 1330.22, 1910.

Patented July 11, 1911.

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JOHN THOMAS Mecanica, or BATTLE eenen,- MrcHIGAm rnavnnrnc` sHEARs.

senese,

Appiieatien med December 22, i919. serien 110.5981864.

Specification of Letters Patent.

To all whom t-'may concern: y A Be it known that l, JOHN- THOMAS Mo- GRATH, of Batt-le Creek, inthe county of Calhoun and-State-of Michigan, one of the United, States of America, have invented certain new 4and useful improvements in Travelin Shears; and-I hereby declare that the ollowing isa full, clear, and exact description of the same.

, 'The object of my invention is to provide "ametal shearing' machine with an intermittently traveling shear blade, and with means for actuating it.

For an understanding of the invention,

reference-is to'be had to the following de- -Scription land to the accompanying drawings Figure -1,- is av'plan view of the shearing machine. Fig. 2, is a front elevation ofthe same, Fig. 3, is a section on theline a-a Eig.. 1.l Eig. 4, is a section orr the line b-b Fig. `1. Fig. 5, is a section on 'the line c-fc Fig. l. Fig. 6, is an elevation ofthe travel`l ing shear blade, carriage and actuating `mechanism, and, Fig. 7, is a detail view of the propeller mechanism and carriage, looking at them from the opposite side to Fig. 6. .Like characters of reference refer to like parts throughout the specification' and drawings.

i Atx the 4sides of the main frame a are standards l) supporting the stationary shear blade d Iand the carriage rail e. Opposed to v the stationary shear blade alis the traveling 'shear blade h slidable invertical guideways in the carriage j. The carriage is pro- .vided with a horizontal slideway vfor the carriage rail e along which ittravels during the operation of the machine, the motion ofthe carriagebeingintermittent to provide a period .of rest during which the travelingshear blade h isv actuated to sever the material as hereinafter described."

'The carriage j is provided with standards Z in the top of which is journaled the motor shaft m litted with a pinion o, the pinion meshing with the spur wheel p fixedl on the driving shaft g, and causing its revolution andthe rotation of the cam 1' and eccentric s. The cam fr 1s xed on the driving `shaft fg r to effectthe movement of the traveling shear blade zf, as the shaft g revolves, and force its cutting edge past the cutting edge of the stationary shear blade, the cam then instantaneously effecting the release of the traveling shear blade so that it can return to its normal or inoperative position under the influence of the spring t. One end ofthe spring is suspended from a pin u at the end of the driving shaft g, and the other end is Patented.cryin-ieri. f.

connected to a pin' u projecting from the' traveling shear blade a slot w being provided in the' carriage j for 'the verticalmovement of the pin o as the traveling shear blade descends under the influence of the cam, and Vrises under the influence of the spring.

The carriage j is provided with guideways a parallel with the carriage rail-c,

4and slidable in the guideways fr is a pro-- peller bar y. Pivoted to the ends of the 'propeller bar g/ are detent dogs z e engaging respectively with racks g gi', secured to the carriage rail c. rlhe detentdogs .e e. are each provided with an arm a the arms being connected by a. link b. and so arranged that when the link is moved in one/direction,

it brings the detent dog z into operative and the detent dog e into inoperative, relation with its rack, and when moved in the other direction,brings the detent dog a into operative, and the detent doge into inoperative, relation with its rack.

The propeller bar y is provided intermediate its ends with a vertical'arm c. hav

ing an elongated slot CZ', and workin in the slot d is a'roller e for the eccentrica The eccentric is fixed on the driving shaft Q and during its revolution causes the roller eto revolve around the driving shaft, the roller moving the arm c forward to a position in front of the driving shaft g and then bearing against it to push the carriage for-- ward on its travel. For example, when the traveling shear blade is moving to the left, the detent dog a is in enga-gemeintl with the teeth of the rackvg,and the detent dog a is out 'of engagement with its rack. The motor L. causes the'revolution of the motor shaft m, and pi-iliona, and the pinion .meshing with the spur Wheel causes the revolution of the driving shaft y, cam r, and 'ecv centric s, the cam r being -timed to actuate the traveling shear blade 7L While the eccentric roller is positioning the propeller bar.

for the advancing movement of the carriage.

'The revolution of the eccentric, as shown in Fig. 5, causesthe roller e -to travel inthe direction indicated by arrow, that is to say during 'the first `quarter of its revolution around the driving shaft, the roller ascends von a forward arc rising in the vslot d mov- 'ing the arm and propeller bar forward, the forward `movement continuing until the roller completes the second pquarter of its revolution. This brings thevertical arm c from a position in rear, to one in front, of

the driving shaft g, and movesl the propeller bar forward a corresponding' distance, the dog a then dropping by gravity into engagement with a tooth of the rack g to prevent the reverse movement of the propeller bar as the roller continues its revolution around the' driving shaft. During the second .half of its revolution, the roller pushes against the arm a', detained in its fixed position by the detent dog-z, and advances the traveling car,- riage the same distance the propeller bar was advanced. The traveling shear blade is then.

actuated to cut the materiahand while this is taking place the eccentric roller is moving the propeller bar to take up a new position for the next advance of the carriage.

When the carriage is moving tothe right, the detent dog z engages with the rack teeth g', the detent dog a then being out of .en-

gagement with the rack teeth' g, the action z terial to be cut is fed across the top of the stationary shear blade d. `The motor h is then started to rotate the motor shaft m and pinion o'. The revolution of the pinion 0 revolves the spur wheel p, driving shaft g, cam fr, and eccentric s, the cam actuating the traveling shear blade, and the eccentric actuating the propelling means for the carriage, the actuation of the cam alternating with that'of the eccentric, so that while the traveling shear blade is operating to cut the material, the carriage will be at rest, and while the traveling shear blade is atlrest, the carriage Iwill move to a .succeeding cut.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent isfl. In a shearing machine, `a traveling shear blade, a stationary shearblade of greater lengt-h than lthe traveling 'shear blade, operable means intermittently moving 4the traveling shear blade alongl the Vstationaryl shearbl'ade, and operable means actuating the traveling shear blade.

2.' In a shearing machine, a carriage, a traveling shear blade mounted in the carriage, a stationary sheary blade of greater length than the traveling shear blade, operablev means intermittently moving the carriage and. travelingshear blade along the stationary shear blade', and operable means actuating the traveling shear blade.

3. In a shearing machine, a stationary shear blade, a carriage, a traveling shear blade mounted in the carriage, means for reversibly holding the traveling shear blade,

means for'moving the carriage, and means for actuating the traveling shear blade..

4. In Va -shearing machine a stationary shear blade, a carriage rail, a rack for the carriage rail, a carriageV movable on'the carriage rail, a propeller bar slidablyv held by the carriage, a detent dog pivoted to the propeller bar and engaging' with the rack, a slotted arm forthe 'propeller'ban la driving shaft, an eccentric for the driving shaft, a roller for the eccentric working in the slotted new position for the v arm, a traveling. gear blade held by the carriage, and meanshfor actuating-the ing shear blade. 'C c 5. In a shearing machine, a main france5-a stationary shear blade, acarriage rail, a rack forvthe carriage rail, a carriage movable on the carriage rail, a propeller bar slidably nheldby the carriage, detent dogs pivotedto the propeller bar, a link connecting the detent dogs to move them into and out of operativefrelation with the rack,a slotted arm for the propellerbar, a driving shaft jour- `naled in the carriage, an eccentric mounted on the driving shaft, a roller for the eccentric operating 1n the slotted "arm to intermittently move the propeller bar, a cam for 4the driving shaft, and a traveling shear blade held by the carriage and actua-ted by the cam. i

6. In a shearing machine, a main frame, a stationary shear blade, a carriage rail, a rack for the carriage rail, a carriage movable on Vthe carriage rail, a-propeller bar slid-ably' held by the carriage, detent dogs ing the detent dogs tof move them into and out of operative relation with the rack, a slotted arm for the propeller bar, a driving pivoted to the propeller bar, a link conect- Y shaft journaled in the carriage, an eccentric shear blade to an ino'perativepositon when mounted on the driving shaft, a roller for released by the Cain. Y .l the eccentric; operating in the slotted arm t0 Battle Creek, December- 10th, 1910.

lintermittently move the propeller bar, a earn JOHN THOMAS MCGRATH.

for the driving shaft, a traveling shear blade Signed in the presence offheld by the carriage and actuated by the THOMAS J. TAYLOR,

13am, and means for restoring the traveling J No. B. LIVINGSTON. 

